Boost Leaks Test & When Do You See A Power Loss
As seen on @ThatRacingChannel. In this test, you’ll see that we put together a basic experiment to test how various sized leaks can affect a turbocharged engine. How much harder does a turbocharger have to work to keep up with the set targeted boost? How much horsepower and torque get affected with a little or big leak? How does the engine behave? What does the exhaust back pressure look like during a pull? The results we found are interesting! Let’s take a look.
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Intentional Starting Variables:
Test 1: Closed System w/o Leaks - 1:32
Test 2: ~⅛” Hole in Hot Side Charge Pipe - 4:05
Test 3: ~¼” Hole in Hot Side Charge Pipe - 7:20
Test 4: ~½” Hole in Hot Side Charge Pipe - 8:58
Test 5: ~¾” Hole in Hot Side Charge Pipe - 11:17
Test 6: ~1” Hole in Hot Side Charge Pipe - 13:55
Test 7: ~1” Hole w/ More Aggressive Boost Control - 16:12
Constants & Conditions:
Engine: 3.2L 2JZ-GTE w/ Mazworx Wet Block (86.5mm Bore x 90mm Stroke; 1mm o/s Valves)
Fuel: One Ethanol 117R
Turbocharger: 6670 Next Gen Precision Turbo
Turbine Housing: 1.00 A/R T4 Divided
Dyno: Superflow SF-Powermark
Boost Controller Target: 15.0psi
Engine Acceleration Rate: 600 rpm/sec
Start & End RPM: 4,000rpm - 8,100rpm
Engine Coolant Temperature: 187F
Ambient Air Temperature: 75.1F
Density Altitude: 1,384 ft
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